No bald eagles were or will be disturbed by your searching in this park. Twice this month, I have observed adult bald eagles roosting on the tall poles over the train tracks next to the Susquehanna River here. They aren't nesting here, but they are resting and observing the traffic (trucks, trains, cars, fish?, other eagles?) at this somewhat busy intersection in Washington Boro. The small shiny cache container is roosting IN THE PARK in an evergreen on the side away from the road. Please be stealthy and bring your own writing implement. If there are muggles, be extra stealthy.
Congratulations to Shamrock Shaker for the First-to-Find.